Navy duvet cover with white piping

I lost my navy duvet cover set yesterday around 3pm, right outside Glasgow Central Station on Hope Street. It's a Queen size, 200-thread cotton with crisp white piping along the edges. There's a small white coffee stain on the back panel near the zipper and a faint 'AP' monogram embroidered in the bottom-right corner. It feels well-loved and is the most comfortable set I own. It's the only bedding I sleep with since the move, so it has sentimental value and I really need it back.